The 12 note, one octave interval exercise is like loaf of bread. Once baked, you can cut it into smaller slices. Those slices all carry the character of that interval. Let's do some of that. Here is an example of a bass line created with a lot of minor seconds in the mix. The same way you can slice a groove into smaller loops to make a cool sounding beat, you can take the chromatic scale and turn fragments of it into leading tones that give your bass line a distinctly chromatic character.